This makes sense. Apple are likely waiting to:
(a) see what their competitors offer up to the release of iOS8/Yosemite;
(b) seeing how far along their data centres are and what they can handle on their current in-house/third-party storage facilities;
(c) if they released full pricing at WWDC then their competitors would know and move to undercut before iOS8/Yo release.
All sensible business reasons for announcing their higher storage price points at the last minute, while offering the lower plan's pricing as a teaser for decent pricing to be expected by their customers.
Yep true!
iOS app:
https://itunes.apple.com/gb/app/dropbox/id327630330?mt=8
1 yr = £70 /
3 mths = £18 (thus
£6 per 1 mth)
vs.
website:
https://www.dropbox.com/upgrade
1 yr = £79 or
1 mth = £8 (thus
£24 per 3 mths)
So the iOS app is both 11% cheaper for the yearly, and 25% on monthly (if erm, paid 3-mthly!).
Weird. Clearly a cock-up surely?! ...Or maybe a hook to catch the iOS/Apple users and keep them!